/*
 * Copyright 2007 Rob Nielsen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * 	http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.googlecode.proxymatic.core.engine;

import com.googlecode.proxymatic.core.ProxyConfiguration;
import com.googlecode.proxymatic.core.ProxyEngine;

import java.util.HashMap;
import java.util.Map;

// FIX ROB Needs to be a weak hash map
public class CachingProxyEngine implements ProxyEngine {
    private final Map<ProxyConfiguration, Object> cache = new HashMap<ProxyConfiguration, Object>();
    private final ProxyEngine delegate;

    public CachingProxyEngine(ProxyEngine delegate) {
        this.delegate = delegate;
    }

    public Object createProxy(ProxyConfiguration proxyConfiguration) {
        Object cachedObject = cache.get(proxyConfiguration);
        if (cachedObject == null) {
            cachedObject = delegate.createProxy(proxyConfiguration);
            cache.put(proxyConfiguration, cachedObject);
        }
        return cachedObject;
    }

    public ProxyConfiguration getProxyConfiguration(Object targetObject) {
        return delegate.getProxyConfiguration(targetObject);
    }
}
